CN103597731A - Power conversion device - Google Patents
Power conversion device Download PDFInfo
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- CN103597731A CN103597731A CN201280002461.1A CN201280002461A CN103597731A CN 103597731 A CN103597731 A CN 103597731A CN 201280002461 A CN201280002461 A CN 201280002461A CN 103597731 A CN103597731 A CN 103597731A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
- H02M7/53871—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
- H02M7/53875—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current with analogue control of three-phase output
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0009—Devices or circuits for detecting current in a converter
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
A power conversion device comprises: a current sensor for detecting phase current flowing through a phase current line; a first phase voltage detection unit for detecting a first phase voltage of the phase current line with reference to the voltage level of a P-line; a second phase voltage detection unit for detecting a second phase voltage of the phase current line with reference to the voltage level of an N-line; an estimation unit for, based on the magnitude and sign of the first phase voltage and the magnitude and sign of the second phase voltage, estimating a zero-cross point timing of the phase current flowing through the phase current line; a calculation unit for obtaining a correction value for the value detected by the current sensor in accordance with the value detected by the current sensor at the estimated zero-cross point timing; and a correction unit for correcting the value detected by the current sensor by using the obtained correction value.
Description
Technical field
The present invention relates to a kind of power conversion device.
Background technology
Current, in power conversion device, use current sensor to detect electric current.This current sensor has residual error (offset).
In patent documentation 1, record following technology, in thering is the electric motor drive system of a plurality of motor and a plurality of inverter circuits, control circuit is for each inverter circuit, if judgement current sensor is non-power status, the measurement data of the current sensor of non-power status is stipulated to time sampling, the mean value of the measurement data obtaining according to sampling, upgrades offset.Thus, according to patent documentation 1, when electric motor drive system moves, use the offset after upgrading, carrying out the zero point of the measurement data of current sensor adjusts, therefore, can get rid of the noise effect from other inverter circuits, carry out accurately the zero point of the current sensor corresponding with each inverter circuit and adjust.
Patent documentation 1: TOHKEMY 2006-258745 communique
Summary of the invention
In the technology of recording at patent documentation 1, only, when current sensor is non-power status, the measurement data of current sensor is sampled, and take and can clearly judge that in inverter it is prerequisite that output current is restricted to while stopping during zero.But even if obtain offset (corrected value) when stopping, when long-time continuous is moved, the residual error of current sensor also may be due to temperature etc. and is departed from gradually, thereby cannot carry out suitable correction.If can not carry out suitable correction, be difficult to detect exactly phase current, be difficult to use detected phase current to carry out exactly the control action of electric motor drive system (power conversion device).
The present invention is exactly in view of the above problems and proposes, and its object is to obtain a kind ofly can, when making run action lasting, carry out the power conversion device of suitably proofreading and correct.
In order to solve above-mentioned problem, to realize object, a related power conversion device of mode of the present invention is characterised in that to have: current sensor, and it detects the phase current flowing through in phase current line; The 1st phase voltage test section, it detects take the 1st phase voltage of the described phase current line that the current potential of P line is benchmark; The 2nd phase voltage test section, it detects take the 2nd phase voltage of the described phase current line that the current potential of N line is benchmark; Infer portion, its size based on described the 1st phase voltage and size and the symbol of symbol and described the 2nd phase voltage, regularly infer the zero crossing of the phase current flowing through in described phase current line; Calculating part, it,, according to the detected value of the described current sensor under described zero crossing timing of inferring out, obtains the corrected value for the detected value of described current sensor; And correction unit, the corrected value that it is obtained described in using, proofreaies and correct the detected value of described current sensor.
The effect of invention
According to the present invention, can, when making run action lasting, obtain at any time the corrected value corresponding with the residual error of current sensor.That is, can, when making run action lasting, carry out suitable correction.
Accompanying drawing explanation
Fig. 1 means the figure of the structure of the power conversion device that execution mode 1 is related.
Fig. 2 means the figure of the current-mode (pattern) in execution mode 1.
Fig. 3 means current-mode in execution mode 1 and the figure of the relation between the sense of current.
Fig. 4 means the figure of the structure of the 1st phase voltage test section in execution mode 1 and the 2nd phase voltage test section.
Fig. 5 means the figure of the action of the portion of inferring in execution mode 1.
Fig. 6 means the figure of the action of the portion of inferring in execution mode 1.
Fig. 7 means the figure of the structure of the calculating part in execution mode 1.
Fig. 8 means the figure of the structure of the correction unit in execution mode 1.
Fig. 9 means the figure of the structure of the calculating part in the variation of execution mode 1.
Figure 10 means the figure of the structure of the calculating part in the variation of execution mode 1.
Figure 11 means the figure of the structure of the calculating part in the variation of execution mode 1.
Figure 12 means the figure of the structure of the power conversion device that execution mode 2 is related.
Figure 13 means the figure of the action of the calculating part in execution mode 2.
Figure 14 means the figure of the structure of the power conversion device that comparative example is related.
Embodiment
Below, based on accompanying drawing, the execution mode of power conversion device involved in the present invention is at length described.In addition, the present invention is not limited to present embodiment.
Execution mode 1.
Use Fig. 1, the power conversion device 1 related to execution mode 1 describes.Fig. 1 means the figure of the structure of power conversion device 1.
Power conversion device 1 is converted to other electric power by supplied with electric power, and by the electric power output after conversion.Power conversion device 1 is for example inverter, and supplied with direct current power is converted to alternating electromotive force, and by the alternating electromotive force being converted to the control object of regulation (such as motor etc.) output.Or power conversion device 1 is for example converter, and the alternating electromotive force of supply is converted to direct current power, and by the direct current power being converted to the control object of regulation (such as inverter etc.) output.Or power conversion device 1 is for example boost chopper or buck chopper device, and supplied with direct current power is converted to the different direct current power of voltage level, and the control object output to regulation by the direct current power being converted to.Below, the situation that the power conversion device 1 of take is inverter, as example describes, is other modes but following explanation is applicable to power conversion device 1 too, such as the situation of converter, boost chopper or buck chopper device etc.
As shown in Figure 1, power conversion device 1 has inverter circuit 90, current sensor 10-u, 10-v, 10-w, the 1st phase voltage test section the 20, the 2nd phase voltage test section 30, infers portion 40, calculating part 50, correction unit 60, control system 70 and pwm circuit 80.
Specifically, inverter circuit 90 has a plurality of switch element Q1-u, Q1-v, Q1-w, Q2-u, Q2-v, Q2-w and a plurality of backflow diode D1-u, D1-v, D1-w, D2-u, D2-v, D2-w.A plurality of switch elements of brachium pontis in a plurality of switch element Q1-u, Q1-v, Q1-w formation, a plurality of switch element Q2-u, Q2-v, Q2-w form a plurality of switch elements of lower brachium pontis.A plurality of switch element Q1-u, Q1-v, Q1-w, Q2-u, Q2-v, Q2-w, with corresponding from the pwm signal of pwm circuit 80 supplies, carry out on/off action in the timing (timing) of regulation respectively.Switch element Q1-u, Q2-u carry out the on/off action corresponding with U phase current.Switch element Q1-v, Q2-v carry out the on/off action corresponding with V phase current.Switch element Q1-w, Q2-w carry out the on/off action corresponding with W phase current.Thus, direct current power is converted to the alternating electromotive force that comprises U phase current, V phase current, W phase current.
Current sensor 10-u, 10-v, 10-w detect the U phase current, V phase current, the W phase current that flow through in U phase current line L-u, V phase current line L-v, W phase current line L-w respectively.Current sensor 10-u, 10-v, 10-w can be for example the current sensors that uses Hall element, can be also the current sensors that uses shunt resistance.Current sensor 10-u, 10-v, 10-w supply with the detected value of U phase current, V phase current, W phase current respectively to calculating part 50 and correction unit 60.
The 1st phase voltage of the phase current line that the current potential of P line Lp is benchmark of take the 1st 20 pairs of phase voltage test sections detects.For example, 20 pairs of the 1st phase voltage test sections be take the 1U phase voltage V1-u of the U phase current line L-u that the current potential of P line Lp is benchmark and are detected.For example, the 1st phase voltage (1V phase voltage, 1W phase voltage) for other detects too.That is, the 1st phase voltage test section 20 also can detect respectively a plurality of the 1st phase voltages (1U phase voltage, 1V phase voltage, 1W phase voltage) concurrently.And the 1st phase voltage test section 20 is supplied with detected result to the portion of inferring 40.
The 2nd phase voltage of the phase current line that the current potential of N line Ln is benchmark of take the 2nd 30 pairs of phase voltage test sections detects.For example, 30 pairs of the 2nd phase voltage test sections be take the 2U phase voltage V2-u of the U phase current line L-u that the current potential of N line Ln is benchmark and are detected.For example, the 2nd phase voltage (2V phase voltage, 2W phase voltage) for other detects too.That is, the 2nd phase voltage test section 30 also can detect respectively a plurality of the 2nd phase voltages (2U phase voltage, 2V phase voltage, 2W phase voltage) concurrently.And the 2nd phase voltage test section 30 is supplied with detected result to the portion of inferring 40.
Specifically, infer the size of portion 40 based on the 1st phase voltage and size and the symbol of symbol and the 2nd phase voltage, infer the direction of the phase current flowing through in phase current line, the direction of the phase current of inferring is occurred to for the timing of reversion, be estimated as the zero crossing of phase current regularly.Inferring portion 40 supplies with the zero crossing that represents to infer out signal (for example, change detection signal) regularly to calculating part 50.
Calculating part 50 receives and represents the zero crossing of inferring out signal regularly from the portion of inferring 40, receives respectively the detected value of U phase current, V phase current, W phase current from current sensor 10-u, 10-v, 10-w.Calculating part 50 obtains the detected value of current sensor under the zero crossing timing of being inferred out by the portion of inferring 40.For example, calculating part 50 obtains the detected value of current sensor 10-u under the zero crossing timing of the U phase current of inferring out, uses the detected value obtaining, and obtains the corrected value for U phase current detected value.For example, for other phase current (V phase current, W phase current), obtain similarly corrected value.That is, calculating part 50 also can, for a plurality of phase currents (U phase current, V phase current, W phase current), be obtained the processing for the corrected value of each phase current detected value concurrently.And calculating part 50 is supplied with the corrected value of obtaining to correction unit 60.
The detected value of the phase current of control system 70 from correction unit 60 receptions are proofreaied and correct.That is, acquisition unit 71 is obtained the detected value of the phase current after correction.In addition, control system 70 receives the instruction of regulation from higher controller (not shown).The detected value of the phase current of control system 70 based on after proofreading and correct, carries out the control action of the regulation corresponding with the instruction of regulation, and the control signal of regulation is supplied with to pwm circuit 80.
In addition, in the above description, " u ", " v ", " w " represent respectively U phase, V phase, W phase.In the following description, omit above-mentioned suffix, and take U mutually as example describes, also identical for other phase (V phase, W phase).
Below, use Fig. 2 and Fig. 3, the principle of inferring of the zero crossing of the phase current in power conversion device 1 is described.Fig. 2 (a) means respectively the figure of the current-mode differing from one another to (f).Fig. 3 is for a plurality of current-modes that differ from one another, and represents the figure of the relation between current-mode and the sense of current.
At power conversion device 1(with reference to Fig. 1) in, using the phase voltage of observing from the current potential of P line Lp as the 1st phase voltage V1, using the phase voltage of observing from the current potential of N line Ln as the 2nd phase voltage V2, by the 1st phase voltage test section 20 and the 2nd phase voltage test section 30, the 1st above-mentioned phase voltage V1, voltage level and the symbol of the 2nd phase voltage V2 are monitored, by the flow direction of 40 pairs of phase currents of the portion of inferring, infer.Infer portion 40 and export (detected value) by the moment (being roughly that electric current is zero moment) the lower current sensor that obtains the phase current symbol (direction) of inferring out and change, thereby can obtain the corrected value corresponding with the offset of current sensor based on this value, and in the process that can continue to carry out in run action, carry out the renewal of the corrected value corresponding with the detected value of current sensor.
The current-mode of the phase current in power conversion device 1, for example, comprise 6 kinds of current-mode CP1 to CP6 as shown in Fig. 2 (a) to (f).
Current-mode CP1 is, the switch element Q1 of upper brachium pontis connects, and the switch element Q2 of lower brachium pontis disconnects, and phase current flows out (with reference to Fig. 2 (a)) via switch element Q1 to phase current line L from P line Lp.That is, current-mode CP1 be phase current from inverter circuit 90(with reference to Fig. 1) current-mode that flows out to phase current line L.
Current-mode CP2 is, the switch element Q1 of upper brachium pontis disconnects, and the switch element Q2 of lower brachium pontis disconnects, and phase current flows out (with reference to Fig. 2 (b)) via backflow diode D2 to phase current line L from N line Ln.That is, current-mode CP2 be phase current from inverter circuit 90(with reference to Fig. 1) current-mode that flows out to phase current line L.
Current-mode CP3 is, the switch element Q1 of upper brachium pontis disconnects, and the switch element Q2 of lower brachium pontis connects, and phase current flows to N line Ln(with reference to Fig. 2 (c) from phase current line L via switch element Q2).That is, current-mode CP3 be phase current from phase current line L to inverter circuit 90(with reference to Fig. 1) current-mode that flows into.
Current-mode CP4 is, the switch element Q1 of upper brachium pontis disconnects, and the switch element Q2 of lower brachium pontis disconnects, and phase current flows to P line Lp(with reference to Fig. 2 (d) from phase current line L via backflow diode D1).That is, current-mode CP4 be phase current from phase current line L to inverter circuit 90(with reference to Fig. 1) current-mode that flows into.
Current-mode CP5 is, the switch element Q1 of upper brachium pontis connects, and the switch element Q2 of lower brachium pontis connects, when short circuit current flows to N line Ln(fault from P line Lp via switch element Q1 and switch element Q2).
Current-mode CP6 is, the switch element Q1 of upper brachium pontis disconnects, and the switch element Q2 of lower brachium pontis disconnects, and do not have phase current to flow through (when phase current=0 or fault or while stopping).
In addition, the size of the 1st phase voltage V1, the 2nd phase voltage V2 in current-mode CP1 to CP6 and the relation between symbol and the direction of phase current, shown in table as shown in Figure 3.In the table shown in Fig. 3, Va represents the turn-on voltage of switch element and backflow diode, and Vb represents to deduct from DC bus-bar voltage the voltage that Va obtains.Usually, several V of Va=, Vb=hundreds of V, have the relation of Va<<Vb.
As shown in Figures 2 and 3, if there is not power conversion device 1 fault in the process that the run action of power conversion device 1 continues to carry out, think that the current-mode of the phase current in power conversion device 1 is some (because the emergence period compole of operating current-mode CP5 is short, therefore can ignore) in current-mode CP1 to CP4.Thus, infer portion 40 mainly size and the symbol of the size based on the 1st phase voltage V1 and symbol and the 2nd phase voltage V2, which in current-mode CP1 to CP4 the current-mode of inferring phase current be, can infer thus the direction of the phase current flowing through in phase current line.
In addition, in the process that the run action of power conversion device 1 continues to carry out, occur in situation that power conversion device 1 fault or output interrupts, it is long-time that the current-mode of the phase current in power conversion device 1 can become current-mode CP5(), CP6.Thus, infer portion 40 at size and the symbol of the size based on the 1st phase voltage V1 and symbol and the 2nd phase voltage V2, the current-mode of inferring out phase current is that current-mode CP5(is long-time), in one of them situation of CP6, also can infer out and in power conversion device 1, break down or export interruption.In this case, in power conversion device 1, also can for example,, by the alarm unit (LED lamp) of regulation, inform and break down or export interruption.
Below, use Fig. 4, for the structure of the 1st phase voltage test section 20 and the 2nd phase voltage test section 30, describe.Fig. 4 (a) means the figure of the structure of the 1st phase voltage test section 20, and Fig. 4 (b) means the figure of the structure of the 2nd phase voltage test section 30.
In the structure shown in Fig. 4 (a) and (b), in upper and lower brachium pontis, comparator is set respectively, according to the output of comparator " H ", " L ", determine size and the symbol of the 1st phase voltage V1, the 2nd phase voltage V2, and according to the 1st phase voltage V1, the 2nd size of phase voltage V2 and the combination of symbol, infer the direction of phase current.
Specifically, as shown in Figure 4 (a), the 1st phase voltage test section 20 has comparator 21, comparator 22, load elements 23, clamper element 24 and voltage generating device 25.Reverse input end of comparator 21 is connected with P line Lp, and reverse input end of comparator 22 is connected with P line Lp via voltage generating device 25.Voltage generating device 25 produces voltage Vc, and this voltage Vc is, compares with the sub-side of reverse input end of comparator 22, higher at the sub-side current potential of reverse input end of comparator 21.The value of voltage Vc is made as, and compares also enough large (Va < Vc) with the turn-on voltage Va of switch element and backflow diode.
Non-inverting input of comparator 21 and non-inverting input of comparator 22, be connected jointly with one end of load elements 23 and one end of clamper element 24.The other end of load elements 23 is connected with phase current line L.The other end of clamper element 24 is connected with the clamp voltage-Vd of regulation.The absolute value of clamp voltage-Vd (Vd) is made as, larger than the turn-on voltage Va of switch element and backflow diode, and than the voltage Vb little (Vc < Vd < Vb) that deducts Va obtain from DC bus-bar voltage.Thus, clamper element 24 is as overvoltage protection elements act, and it is by with clamp voltage Vd, the current potential of the sub-side of non-inverting input of comparator 21 and comparator 22 being limited, thereby is difficult for applying overvoltage to comparator 21 and comparator 22.
In the 1st phase voltage test section 20 shown in Fig. 4 (a), comparator 21, comparator 22 compare respectively action, and export comparative result S21, S22.
As shown in Figure 4 (b), the 2nd phase voltage test section 30 has comparator 31, comparator 32, load elements 33, clamper element 34 and voltage generating device 35.Reverse input end of comparator 31 is connected with N line Ln via voltage generating device 35, and reverse input end of comparator 32 is connected with N line Ln.Voltage generating device 35 produces voltage Vc, and this voltage Vc is, compares with the sub-side of reverse input end of comparator 32, higher at the sub-side current potential of reverse input end of comparator 31.The value of voltage Vc is made as, and compares also enough large (Va < Vc) with the turn-on voltage Va of switch element and backflow diode.
Non-inverting input of comparator 31 and non-inverting input of comparator 32, be connected jointly with one end of load elements 33 and one end of clamper element 34.The other end of load elements 33 is connected with phase current line L.The other end of clamper element 34 is connected with the clamp voltage Vd of regulation.Clamp voltage Vd is made as, larger than the turn-on voltage Va of switch element and backflow diode, and than the voltage Vb little (Vc < Vd < Vb) that deducts Va obtain from DC bus-bar voltage.Thus, clamper element 34 is as overvoltage protection elements act, and it is by with clamp voltage Vd, the current potential of the sub-side of non-inverting input of comparator 31 and comparator 32 being limited, thereby is difficult for applying overvoltage to comparator 31 and comparator 32.
In the 2nd phase voltage test section 30 shown in Fig. 4 (b), comparator 31, comparator 32 compare respectively action, and export comparative result S31, S32.
Below, use Fig. 5 and Fig. 6 to describe the action of the portion of inferring 40.
Infer portion 40 according to comparative result S21, S22 from the 1st phase voltage test section 20, as shown in Fig. 5 (a), Fig. 6 (a), determine current-mode, and infer thus the direction of phase current.In the table shown in Fig. 6 (a), with " * " indicate without situation, with " uncertain ", represent to judge the situation of the sense of current.
For example, in the situation that comparative result S21, S22 are " H " level, infer symbol that portion 40 infers the 1st phase voltage V1 for just and size be about voltage Va, therefore, inferring current-mode is that CP4(is with reference to Fig. 3).Thus, infer direction that portion 40 the infers phase current direction (with reference to Fig. 2 (d)) for flowing into inverter circuit 90.
Or, for example, at comparative result S21, be " L " level, comparative result S22 for " H " level in the situation that, infer symbol that portion 40 infers the 1st phase voltage V1 and be about voltage ﹣ Va for negative and size, therefore, inferring current-mode is that CP1, CP5(are with reference to Fig. 3).Thus, if infer portion 40, do not infer out in power conversion device 1 and break down, the direction (with reference to Fig. 2 (a)) of the direction of inferring phase current for flowing out from inverter circuit 90.
Or, for example, in the situation that comparative result S21, S22 are " L " level, infer symbol that portion 40 infers the 1st phase voltage V1 and be about voltage ﹣ Vb for negative and size, therefore, inferring current-mode is that CP2, CP3(are with reference to Fig. 3).Thus, infer direction that portion 40 infers phase current for the direction that flows out with respect to inverter circuit 90 or the direction (that is, direction is " uncertain ") (with reference to Fig. 2 (b), (c)) of inflow.
In addition, infer portion 40 according to comparative result S31, S32 from the 2nd phase voltage test section 30, as shown in Fig. 5 (b), Fig. 6 (b), determine current-mode, and infer thus the direction of phase current.In the table shown in Fig. 6 (b), with " * " indicate without situation, with " uncertain ", represent the situation that the sense of current cannot be judged.
For example, in the situation that comparative result S31, S32 are " L " level, infer symbol that portion 40 infers the 2nd phase voltage V2 and be about voltage ﹣ Va for negative and size, therefore, inferring current-mode is that CP2(is with reference to Fig. 3).Thus, infer direction that portion 40 the infers phase current direction (with reference to Fig. 2 (b)) for flowing out from inverter circuit 90.
Or, for example, at comparative result S31, be " L " level, comparative result S32 for " H " level in the situation that, infer symbol that portion 40 infers the 2nd phase voltage V2 for just and size be about voltage Va, therefore, inferring current-mode is that CP3, CP5(are with reference to Fig. 3).Thus, if infer portion 40, do not infer out in power conversion device 1 and break down, the direction (with reference to Fig. 2 (c)) of the direction of inferring phase current for flowing into inverter circuit 90.
Or, for example, in the situation that comparative result S31, S32 are " H " level, infer symbol that portion 40 infers the 2nd phase voltage V2 for just and size be about voltage Vb, therefore, inferring current-mode is that CP1, CP4(are with reference to Fig. 3).Thus, infer direction that portion 40 infers phase current for the direction that flows out with respect to inverter circuit 90 or the direction (that is, direction is " uncertain ") (with reference to Fig. 2 (a), (d)) of inflow.
As mentioned above, only use from comparative result S21, the S22 of the 1st phase voltage test section 20 with from the side in comparative result S31, the S32 of the 2nd phase voltage test section 30, sometimes cannot infer the direction of phase current.Thus, as shown in Figure 6 (c), infer portion 40 use from comparative result S21, the S22 of the 1st phase voltage test section 20 and from comparative result S31, the S32 of the 2nd phase voltage test section 30 the two, infer the direction of phase current.
For example, in the situation that comparative result S21, S22, S31, S32 are respectively " HHLH " level, inferring portion 40, to infer current-mode be that CP3, CP4(are with reference to Fig. 5 (a) and (b)), the direction (with reference to Fig. 2 (c), (d)) of the direction of thus, inferring phase current for flowing into inverter circuit 90.
For example, in the situation that comparative result S21, S22, S31, S32 are respectively " HHHH " level, inferring portion 40, to infer current-mode be that CP4(is with reference to Fig. 5 (a) and (b)), thus, the direction (with reference to Fig. 2 (d)) of the direction of inferring phase current for flowing into inverter circuit 90.
For example, in the situation that comparative result S21, S22, S31, S32 are respectively " LLLH " level, inferring portion 40, to infer current-mode be that CP3(is with reference to Fig. 5 (a) and (b)), thus, the direction (with reference to Fig. 2 (c)) of the direction of inferring phase current for flowing into inverter circuit 90.
For example, in the situation that comparative result S21, S22, S31, S32 are respectively " LHLL " level, if do not broken down in power conversion device 1, inferring portion 40, to infer current-mode be that CP1, CP2(are with reference to Fig. 5 (a) and (b)), the direction (with reference to Fig. 2 (a) and (b)) of the direction of thus, inferring phase current for flowing out from inverter circuit 90.
For example, in the situation that comparative result S21, S22, S31, S32 are respectively " LLLL " level, inferring portion 40, to infer current-mode be that CP2(is with reference to Fig. 5 (a) and (b)), thus, the direction (with reference to Fig. 2 (b)) of the direction of inferring phase current for flowing out from inverter circuit 90.
For example, in the situation that comparative result S21, S22, S31, S32 are respectively " LHHH " level, inferring portion 40, to infer current-mode be that CP1(is with reference to Fig. 5 (a) and (b)), thus, the direction (with reference to Fig. 2 (a)) of the direction of inferring phase current for flowing out from inverter circuit 90.
For example, in the situation that comparative result S21, S22, S31, S32 are respectively " LHLH " level, inferring portion 40, to infer current-mode be that CP5(is with reference to Fig. 5 (a) and (b)), thus, infer in power conversion device 1, break down (short circuit) (with reference to Fig. 2 (e)).
As mentioned above, in the portion of inferring 40, by the output of comparator 21,22,31,32 (comparative result S21, S22, S31, S32) is monitored, thereby can infer the variation (flow into → flow out and flow out → flow into) of the sense of current.Infer portion 40 direction of the phase current of inferring is occurred to for the timing of reversion, be estimated as the zero crossing of phase current regularly.Inferring portion 40 supplies with the zero crossing that represents to infer out signal (for example, change detection signal) regularly to calculating part 50.
Below, use Fig. 7 to describe the structure of calculating part 50.Fig. 7 means the figure of the structure of calculating part 50.
Calculating part 50 has acquisition unit 53 and corrected value determination portion 54.The zero crossing that acquisition unit 53 is inferred out from the portion's of inferring 40 reception expressions signal regularly.Acquisition unit 53 is obtained the detected value of current sensor 10 under the zero crossing timing of inferring out, and supplies with to corrected value determination portion 54.As shown in Figure 7, calculating part 50 inputs to microcomputer by the output of current sensor 10 (detected value) via A/D converter to example.That is, acquisition unit 53 has A/D converter 51.Corrected value determination portion 54 has a part for microcomputer 52.In addition, A/D converter 51 also can be built in microcomputer 52.
A/D converter 51 for example receives sampling instruction from the portion of inferring 40, as the zero crossing that represents to infer out signal regularly.A/D converter 51, according to sampling instruction, carries out A/D conversion to the detected value of current sensor 10 (analog signal), and the detected value (digital signal) of the current sensor 10 that conversion is obtained is supplied with to microcomputer 52.Thus, acquisition unit 53 is obtained the detected value (digital signal) of current sensor 10, and supplies with to microcomputer 52.
As mentioned above, by generate sampling instruction when the sense of current changes, obtain the detected value of current sensor 10, thereby can obtain the detected value of the current sensor 10 when current zero-crossing point.
And corrected value determination portion 54 is for example directly defined as corrected value by the detected value obtaining.That is, corrected value determination portion 54 is directly used the detected value obtaining to obtain corrected value.Corrected value determination portion 54 is supplied with the corrected value of obtaining to correction unit 60.
In addition, the detected value of the current sensor 10 when by current zero-crossing point, when being directly worth by way of compensation and being defined as corrected value, also can replace obtained detected value to be directly defined as this mode of corrected value, and the value after the detected value equalization of repeatedly obtaining is directly defined as to corrected value.Or, also the detected value to obtained can be applied to the value that low-pass filtering obtains, be directly defined as corrected value.
Below, use Fig. 8 to describe the structure of correction unit 60.Fig. 8 means the figure of the structure of correction unit 60.
Specifically, correction unit 60 has subtracter 61.Subtracter 61, from the detected value of current sensor 10 received current transducers 10, receives corrected value from calculating part 50, from the detected value of current sensor 10, deducts corrected value.Thus, correction unit 60 can be eliminated compensation rate from the detected value of current sensor 10.
As shown in figure 14, only suppose to consider when power converter 900 stops the situation that the residual error of current sensor 10 is measured here.That is, 910 pairs of power converters 900 of acquisition unit stop this situation to be confirmed, obtains the detected value of current sensor 10 at power converter 900 stopping periods, and the detected value obtaining is supplied with to corrected value determination portion 920.Corrected value determination portion 920 is directly defined as corrected value by the detected value obtaining, and to correction unit 960, supplies with.Correction unit 960 is preserved the corrected value of supplying with.Then, the action if power converter 900 brings into operation, correction unit 960 is used the corrected value of preserving, and the detected value of current sensor 10 is proofreaied and correct, and supplied with to control system 70.That is, correction unit 960, using preserved corrected value as fixed value, is proofreaied and correct.In this case, when long-time continuous is moved, the residual error of current sensor 10 departs from gradually due to temperature etc., possibly cannot carry out suitable correction.
If can not carry out suitable correction, be difficult to detect exactly phase current, be also difficult to use detected phase current, carry out exactly the control action of power conversion device 900.
On the other hand, in execution mode 1, in power converter 1, by the 1st phase voltage test section 20, detect and take the 1st phase voltage V1 of the phase current line L that the current potential of P line Lp is benchmark respectively, by the 2nd phase voltage test section 30, detect and take the 2nd phase voltage V2 of the phase current line L that the current potential of N line Ln is benchmark, infer the size of portion 40 based on the 1st phase voltage V1 and size and the symbol of symbol and the 2nd phase voltage V2, infer the zero crossing of the phase current flowing through regularly in phase current line L.The detected value of calculating part 50 current sensor 10 under regularly according to the zero crossing of inferring out, obtains the corrected value for current sensor 10 detected values.Correction unit 60 is used the corrected value of obtaining, and the detected value of current sensor 10 is proofreaied and correct.Thus, can, when making run action lasting, obtain at any time the corrected value corresponding with the residual error of current sensor.That is, can when making run action lasting, carry out suitable correction.
Thus, even in the situation that the residual error of long-time continuous when operation current sensor departs from gradually due to temperature etc., also can improve at any time the precision of correction, therefore, can carry out exactly the detection of phase current, can use detected phase current, carry out exactly the control action of power conversion device 900.
Or, suppose to consider for example as current sensor 10, to use the situation of low-price electricity flow sensor.In this case, the temperature drift of detected value is very large, even in the short time continuously during operation, the residual error of current sensor 10 also easily departs from due to temperature etc. gradually, and the possibility that cannot carry out suitable correction is very high.
On the other hand, in execution mode 1, due to can be when making run action lasting, obtain at any time the corrected value corresponding with the residual error of current sensor 10, therefore, even in the situation that using low-price electricity flow sensor as current sensor 10, also can carry out suitable correction when making run action lasting.That is, the manufacturing cost of power conversion device 1 can be reduced, and suitable correction can be when making run action lasting, carried out.
In addition, in execution mode 1, infer the size of portion 40 based on the 1st phase voltage V1 and size and the symbol of symbol and the 2nd phase voltage V2, infer the direction of the phase current flowing through in phase current line L, the direction of the phase current of inferring be there is to the timing of reversion, be estimated as the zero crossing of phase current regularly.Thus, can utilize simple structure to infer the zero crossing timing of phase current.
In addition, in execution mode 1, calculating part 50 obtains the detected value of current sensor 10 under the zero crossing timing of inferring out by the portion of inferring 40, uses the detected value obtaining to obtain corrected value.For example, in calculating part 50, acquisition unit 53 is obtained the detected value of current sensor 10 under the zero crossing timing of inferring out, and corrected value determination portion 54 is directly defined as corrected value by obtained detected value.Thus, can utilize simple structure, obtain the corrected value for current sensor 10 detected values.
In addition, as shown in Figure 9, calculating part 50i also can be made as corrected value by the certain proportion of obtained detected value (or obtained detected value is applied to equalization, low-pass filtering and the value that obtains).In this case, calculating part 50i has acquisition unit 53, certain proportion operational part 55i and corrected value determination portion 54.Acquisition unit 53 is obtained the detected value of current sensor 10 under the zero crossing timing of inferring out, and supplies with to certain proportion operational part 55i.Certain proportion operational part 55i makes obtained detected value be multiplied by certain COEFFICIENT K, and obtaining with respect to obtained detected value is a certain proportion of value.Certain COEFFICIENT K, is to obtain by pre-trial the coefficient that the detected value of current sensor 10 of zero crossing under regularly and the relation between the residual error of current sensor 10 are obtained, the value of K be for example greater than 0 and to be less than or equal to 1.5(be for example 0.7).Certain proportion operational part 55i supplies with the value of obtaining to corrected value determination portion 54.Corrected value determination portion 54 is a certain proportion of value with respect to obtained detected value by the value of obtaining, and is defined as corrected value.
Thus, in the situation that the error of obtaining processing of the detected value of the current sensor 10 that the error of inferring processing that the sense of current that portion 40 carries out changes or calculating part 50i carry out is inferred in existence, for fear of exaggerated correction, the slightly little value of the detected value than obtained can be made as to corrected value.Or, for fear of undercorrection, the slightly large value of the detected value than obtained can be made as to corrected value.; in the situation that the error of obtaining processing of the detected value of the current sensor 10 that the error of inferring processing that the sense of current that portion 40 carries out changes or calculating part 50i carry out is inferred in existence; can consider above-mentioned error and proofread and correct; therefore, can when making run action lasting, carry out more suitable correction.
Or, as shown in figure 10, the corrected value that calculating part 50j inscribes regularly time the renewal of last corrected value and this detected value obtaining (or obtained detected value is implemented to equalization, low-pass filtering and the value that obtains) compare, poor according to the two, adjusts correcting value with certain value.In this case, calculating part 50j has acquisition unit 53, storage part 58j, poor calculating part 56j, adjustment part 57j and corrected value determination portion 54.Acquisition unit 53 is obtained the detected value of current sensor 10 under the zero crossing timing of inferring out, and supplies with to poor calculating part 56j.The corrected value that the renewal that storage part 58j stores last corrected value is inscribed regularly time, the corrected value of obtaining by 54 last times of corrected value determination portion.Poor calculating part 56j is from acquisition unit 53 receives obtained detected value, with reference to storage part 58j, obtains the corrected value that the last time obtains.Poor calculating part 56j obtains the poor of the last time corrected value of trying to achieve and the detected value obtaining.For example, poor calculating part 56j, by deducting obtained detected value the corrected value of obtaining from the last time, obtains both poor.Poor calculating part 56j supplies with the difference of obtaining to adjustment part 57j.
Adjustment part 57j is corresponding to the symbol of the difference of obtaining, and the corrected value that uses certain value to obtain the last time is adjusted, so that the absolute value of the difference of obtaining by poor calculating part 56j after adjusting is less than current poor (that obtains is poor).For certain value, pre-determine as comparing relatively little value with the residual error of current sensor 10.For example, in the situation that obtained difference be by from deduct obtained detected value in the corrected value once obtained and obtain, if the symbol of the difference of obtaining is for just, the corrected value that adjustment part 57j obtained from the last time, deduct certain value, if the symbol of the difference of obtaining is for negative, the corrected value that adjustment part 57j obtained the last time adds certain value.Adjustment part 57j supplies with the corrected value after adjusting to corrected value determination portion 54.Corrected value determination portion 54 by the corrected value after adjusting, add/deduct the value that certain value obtains in the upper corrected value of once obtaining, is defined as corrected value.
Thus, in the situation that calculating part 50 on there is error in the calculation process of difference of the corrected value once obtained and the detected value that obtains, for fear of exaggerated correction, can adjust gradually several times corrected value.; in the situation that calculating part 50 on there is error in the calculation process of difference of the corrected value once obtained and the detected value that obtains; owing to considering that this error proofreaies and correct, therefore can when making run action lasting, carry out more suitable correction.
Or, as shown in figure 11, the corrected value that calculating part 50k also can be to the renewal of last corrected value inscribes regularly time and this detected value obtaining (or the detected value obtaining is implemented to equalization, low-pass filtering and the value that obtains) compare, and according to the difference of the two, take with respect to this difference as a certain proportion of value, correcting value is adjusted.In this case, calculating part 50k has acquisition unit 53, storage part 58j, poor calculating part 56j, certain proportion operational part 55k, adjustment part 57k and corrected value determination portion 54.Acquisition unit 53 is obtained the detected value of current sensor 10 under the zero crossing timing of inferring out, and supplies with to poor calculating part 56j.The corrected value that the renewal that storage part 58j is stored in last corrected value is inscribed regularly time, the corrected value of being obtained by 54 last times of corrected value determination portion.Poor calculating part 56j is after acquisition unit 53 receives obtained detected value, with reference to storage part 58j, obtains the corrected value that the last time obtains.Poor calculating part 56j obtains the poor of the last time corrected value of trying to achieve and the detected value obtaining.For example, differ from calculating part 56j and obtain both poor by deducting obtained detected value the corrected value of obtaining from the last time.Poor calculating part 56j supplies with the difference of obtaining to certain proportion operational part 55k and adjustment part 57k.
Certain proportion operational part 55k is multiplied by certain COEFFICIENT K 1 to the difference of obtaining, and obtaining with respect to obtained difference is a certain proportion of value.Certain COEFFICIENT K 1, is to obtain by experiment in advance the coefficient that the difference obtained by poor calculating part 56j and the relation between the residual error of current sensor 10 are obtained, its value be for example greater than 0 and to be less than 1(be for example 0.7).Certain proportion operational part 55k supplies with obtained value to adjustment part 57k.
Adjustment part 57k is corresponding to the symbol of obtained difference, the value that use is obtained by certain proportion operational part 55k, the corrected value that last time is obtained is adjusted, so that the absolute value of the difference of obtaining by poor calculating part 56j after adjusting is less than current poor (that obtains is poor).That is, adjustment part 57k is corresponding to the symbol of the difference of obtaining, and using is a certain proportion of value with respect to the difference of obtaining, and the corrected value that the last time is obtained is adjusted.For example, in the situation that the difference of obtaining be by from deduct obtained detected value in the corrected value once obtained and try to achieve, if the symbol of the difference of obtaining is for just, the corrected value that adjustment part 57k obtained from the last time, deducting with respect to obtained difference is a certain proportion of value, if and the symbol of the difference of obtaining is negative, the corrected value that adjustment part 57k obtained the last time adds that with respect to obtained difference be a certain proportion of value.Adjustment part 57k supplies with the corrected value after adjusting to corrected value determination portion 54.Corrected value determination portion 54 adds/deducts a certain proportion of value of obtained difference by the corrected value after adjusting, the corrected value the last time obtained and the value that obtains, is defined as corrected value.
Thus, in the situation that calculating part 50 on there is error in the calculation process of difference of the corrected value once obtained and the detected value that obtains, for fear of exaggerated correction, can along with obtained difference, reduce and put forward gradually high accuracy of adjustment, and corrected value is adjusted several times gradually.; in the situation that calculating part 50 on there is error in the calculation process of difference of the corrected value once obtained and the detected value that obtains; owing to can considering this error and adjusting precision and proofread and correct, therefore can when making run action lasting, carry out more suitable correction.
Execution mode 2.
Below, the power conversion device 100 related for execution mode 2 describes.Below, around the part different from execution mode 1, describe.
In execution mode 1, in calculating part 50, the detected value of the current sensor 10 during for zero crossing to phase current is sampled, need special-purpose current detection circuit, be that A/D converter 51(in acquisition unit 53 is with reference to Fig. 7) etc., but in actual device, due to the restriction of cost etc., sometimes cannot prepare special-purpose A/D converter etc.
Thus, in execution mode 2, under above-mentioned restriction condition, by the detected value of the current sensor under regularly to the zero crossing of inferring out, infer, thus the detected value of the current sensor 10 while obtaining approx the zero crossing of phase current.
Specifically, power conversion device 100 has calculating part 150.By append the function that the detected value of current sensor 10 is inferred in calculating part 150, thereby omit the acquisition units 53 such as special-purpose A/D converter.That is, calculating part 150 has electric current and infers portion 151 and corrected value determination portion 152.
As shown in figure 13, electric current is inferred the voltage, loading condition, state of a control of detected value that the current detection circuit (acquisition unit 71) of portion 151 based on using from former control system 70 obtain and control system 70 outputs etc., and the variation of phase current is inferred.
Specifically, electric current is inferred portion 151 and from control system 70, is received the detected value of the current sensor 10 obtaining by acquisition unit 71.Electric current is inferred portion 151 using the detected value of the current sensor obtaining 10 as " last value ", is plotted in the output current-moment plane shown in Figure 13.In addition, electric current is inferred portion 151 from information such as the voltage of control system 70 receiving control systems 70 outputs, loading condition, state of a controls.Electric current is inferred portion 151 according to above-mentioned information, and the slope that phase current is changed is inferred.And electric current is inferred portion 151 and is received pwm signal from pwm circuit 80.Electric current is inferred portion 151 based on pwm signal, infers the moment that the symbol of the slope that phase current changes changes.Electric current is inferred the infer result of portion 151 based on above-mentioned, infers out the waveform that the phase current shown in Figure 13 changes, and infers at any time the detected value of the current current sensor 10 corresponding with the passage of time.For example, and electric current is inferred portion 151 and is represented after the zero crossing infer out signal (change detection signal) regularly receiving, by the detected value of the current sensor of inferring out under this timing 10 to 152 supplies of corrected value determination portion.That is, electric current is inferred the detected value of the current sensor of 151 pairs of zero crossings of inferring out of portion under regularly and is inferred, and supplies with to corrected value determination portion 152.
Corrected value determination portion 152 is used the detected value of inferring out to obtain corrected value.Corrected value determination portion 152 is for example directly used the detected value of inferring out to obtain corrected value.Corrected value determination portion 152 is supplied with the corrected value of obtaining to correction unit 60.
As mentioned above, in execution mode 2, the current detection value of calculating part 150 based on last, according to output voltage and loading condition thereafter, infer out curent change, for example, when having inputted the signal (change detection signal) that represents zero crossing timing, this presumed value is used as corrected value.Thus, even for example, in the situation that there is no special-purpose current detection circuit (special-purpose A/D converter), also can upgrade the corrected value for current sensor detected value.That is, without the current detection circuit (acquisition unit 53) of preparing compensation correction special use, can be by the current detection circuit (obtaining 71) of use in former control system 70 is also used as to the current detection circuit for compensation correction, and realize compensation correction.
Industrial applicibility
As mentioned above, power conversion device involved in the present invention, is applicable to the correction of the detected value of current sensor.
The explanation of label
1 power conversion device
10 current sensors
20 the 1st phase voltage test sections
21 comparators
22 comparators
23 load elements
24 clamper elements
25 voltage generating devices
30 the 2nd phase voltage test sections
31 comparators
32 comparators
33 load elements
34 clamper elements
35 voltage generating devices
40 infer portion
50,50i, 50j, 50k calculating part
51 A/D converters
52,52i, 52j, 52k microcomputer
53 acquisition units
54 corrected value determination portions
55i certain proportion operational part
The poor calculating part of 56j
57j, 57k adjustment part
58j storage part
60 correction units
61 subtracters
70 control system
71 acquisition units
80 pwm circuits
90 inverter circuits
100 power conversion devices
150 calculating parts
151 electric currents are inferred portion
152 corrected value determination portions
900 power converters
910 acquisition units
920 corrected value determination portions
960 correction units.
Claims (8)
1. a power conversion device, is characterized in that, has:
Current sensor, it detects the phase current flowing through in phase current line;
The 1st phase voltage test section, it detects take the 1st phase voltage of the described phase current line that the current potential of P line is benchmark;
The 2nd phase voltage test section, it detects take the 2nd phase voltage of the described phase current line that the current potential of N line is benchmark;
Infer portion, its size based on described the 1st phase voltage and size and the symbol of symbol and described the 2nd phase voltage, regularly infer the zero crossing of the phase current flowing through in described phase current line;
Calculating part, its according to described in the detected value of the zero crossing of inferring out the described current sensor under regularly, obtain the corrected value for the detected value of described current sensor; And
Correction unit, the corrected value that it is obtained described in using, proofreaies and correct the detected value of described current sensor.
2. power conversion device according to claim 1, is characterized in that,
The described size of portion based on described the 1st phase voltage and size and the symbol of symbol and described the 2nd phase voltage of inferring, direction to the phase current flowing through in described phase current line is inferred, and the timing that inferred phase current direction is occurred to for reversion is estimated as described zero crossing regularly.
3. power conversion device according to claim 1, is characterized in that,
Described calculating part obtains the detected value of described current sensor under described zero crossing timing of inferring out, uses the detected value obtaining to obtain described corrected value.
4. power conversion device according to claim 1, is characterized in that,
Described calculating part is inferred the detected value of the described current sensor under described zero crossing timing of inferring out, uses the detected value of inferring out to obtain described corrected value.
5. power conversion device according to claim 3, is characterized in that,
Described calculating part is directly used the detected value obtaining to obtain described corrected value.
6. power conversion device according to claim 3, is characterized in that,
It is a certain proportion of value with respect to obtained detected value that described calculating part is used, and obtains described corrected value.
7. power conversion device according to claim 3, is characterized in that,
Described calculating part has:
Poor calculating part, it calculates the poor of the last corrected value of obtaining and the detected value obtaining; And
Adjustment part, it uses certain value corresponding to the symbol of the difference of obtaining by described poor calculating part, and the corrected value that the described last time is obtained is adjusted.
8. power conversion device according to claim 3, is characterized in that,
Described calculating part has:
Poor calculating part, it calculates the poor of the last corrected value of obtaining and the detected value obtaining; And
Adjustment part, it is corresponding to the symbol of the difference of obtaining by described poor calculating part, and using is a certain proportion of value with respect to the described difference of obtaining, and the corrected value that the described last time is obtained is adjusted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2012/059920 WO2013153638A1 (en) | 2012-04-11 | 2012-04-11 | Power conversion device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103597731A true CN103597731A (en) | 2014-02-19 |
| CN103597731B CN103597731B (en) | 2015-06-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201280002461.1A Expired - Fee Related CN103597731B (en) | 2012-04-11 | 2012-04-11 | Power conversion device |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US8514600B1 (en) |
| JP (1) | JP5132848B1 (en) |
| CN (1) | CN103597731B (en) |
| DE (1) | DE112012001307B4 (en) |
| WO (1) | WO2013153638A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106053916A (en) * | 2015-03-18 | 2016-10-26 | 大众汽车有限公司 | Vechile-mounted power supply and method for measuring current in conductor of vechile-mounted power supply |
| CN109275351A (en) * | 2016-05-17 | 2019-01-25 | 日立汽车系统株式会社 | Control device for inverter and power inverter |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5983567B2 (en) * | 2013-09-10 | 2016-08-31 | トヨタ自動車株式会社 | Electric motor control device |
| EP3261247B1 (en) * | 2015-02-16 | 2022-07-06 | Mitsubishi Electric Corporation | Power conversion device |
| DE102019121514A1 (en) * | 2019-08-09 | 2021-02-11 | Thyssenkrupp Ag | Control device and bridge circuit with such a control device |
| US20220368212A1 (en) * | 2021-05-14 | 2022-11-17 | Carrier Corporation | Systems and methods for current sensing and control for multiphase power converters |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63274398A (en) * | 1987-04-28 | 1988-11-11 | Mitsubishi Electric Corp | Speed controller for ac motor |
| JP2001078494A (en) * | 1999-09-06 | 2001-03-23 | Yaskawa Electric Corp | Method of correcting dc offset of ac motor driver |
| JP2004312930A (en) * | 2003-04-09 | 2004-11-04 | Toyota Motor Corp | Motor controller |
| JP2007069836A (en) * | 2005-09-09 | 2007-03-22 | Honda Motor Co Ltd | Electric power steering device |
| JP2007159348A (en) * | 2005-12-08 | 2007-06-21 | Honda Motor Co Ltd | Controller of motor |
| US20090067205A1 (en) * | 2006-05-29 | 2009-03-12 | Toyota Jidosha Kabushiki Kaisha | Power Controller and Vehicle Equipped with Power Controller |
| CN101507096A (en) * | 2006-08-10 | 2009-08-12 | 丰田自动车株式会社 | Motor driving system and method for controlling the same |
| US20090310390A1 (en) * | 2005-04-28 | 2009-12-17 | Origin Electric Company, Limited | Electrical power source, operational method of the same, inverter and operational method of the same |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6121736A (en) * | 1998-07-10 | 2000-09-19 | Matsushita Electric Industrial Co., Ltd. | Control apparatus for motor, and motor unit having the control apparatus |
| US8115423B2 (en) | 2005-03-18 | 2012-02-14 | Toyota Jidosha Kabushiki Kaisha | Motor driving system and controlling method of the same |
| JP4710367B2 (en) | 2005-03-18 | 2011-06-29 | トヨタ自動車株式会社 | Motor drive system |
| JP2007192723A (en) | 2006-01-20 | 2007-08-02 | Nissan Motor Co Ltd | Current sensor correcting system and technique |
| JP5211869B2 (en) | 2008-06-10 | 2013-06-12 | トヨタ自動車株式会社 | Electric motor control device, offset determination method, and offset correction method |
-
2012
- 2012-04-11 DE DE112012001307.7T patent/DE112012001307B4/en not_active Expired - Fee Related
- 2012-04-11 US US13/814,998 patent/US8514600B1/en not_active Expired - Fee Related
- 2012-04-11 JP JP2012539123A patent/JP5132848B1/en not_active Expired - Fee Related
- 2012-04-11 CN CN201280002461.1A patent/CN103597731B/en not_active Expired - Fee Related
- 2012-04-11 WO PCT/JP2012/059920 patent/WO2013153638A1/en active Application Filing
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63274398A (en) * | 1987-04-28 | 1988-11-11 | Mitsubishi Electric Corp | Speed controller for ac motor |
| JP2001078494A (en) * | 1999-09-06 | 2001-03-23 | Yaskawa Electric Corp | Method of correcting dc offset of ac motor driver |
| JP2004312930A (en) * | 2003-04-09 | 2004-11-04 | Toyota Motor Corp | Motor controller |
| US20090310390A1 (en) * | 2005-04-28 | 2009-12-17 | Origin Electric Company, Limited | Electrical power source, operational method of the same, inverter and operational method of the same |
| JP2007069836A (en) * | 2005-09-09 | 2007-03-22 | Honda Motor Co Ltd | Electric power steering device |
| JP2007159348A (en) * | 2005-12-08 | 2007-06-21 | Honda Motor Co Ltd | Controller of motor |
| US20090067205A1 (en) * | 2006-05-29 | 2009-03-12 | Toyota Jidosha Kabushiki Kaisha | Power Controller and Vehicle Equipped with Power Controller |
| CN101507096A (en) * | 2006-08-10 | 2009-08-12 | 丰田自动车株式会社 | Motor driving system and method for controlling the same |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106053916A (en) * | 2015-03-18 | 2016-10-26 | 大众汽车有限公司 | Vechile-mounted power supply and method for measuring current in conductor of vechile-mounted power supply |
| CN109275351A (en) * | 2016-05-17 | 2019-01-25 | 日立汽车系统株式会社 | Control device for inverter and power inverter |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5132848B1 (en) | 2013-01-30 |
| WO2013153638A1 (en) | 2013-10-17 |
| DE112012001307T5 (en) | 2014-01-02 |
| CN103597731B (en) | 2015-06-10 |
| US8514600B1 (en) | 2013-08-20 |
| DE112012001307B4 (en) | 2018-02-15 |
| JPWO2013153638A1 (en) | 2015-12-17 |
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